You need to scan the QR code in the manual to download the application, or search and download "Da Fit" in the application market
Or visit: http://app.crrepa.com/site/download-cn
Turn on the Bluetooth of the mobile phone, select [Add or bind a watch] in the APP, and select "KUMI GW16T" to connect
Once the connection is successful, the date, time and language on the watch will be automatically updated